Angle cock



Mar. 5, 1929. FA M 1,703,875

ANGLE COCK .l'iled Oct. 5, "1927 4 E I I. Q J3 lll I '2 4 INVENTOR CLYDE c. FARMER BYWWM ATTORNEY Patented Mar. 5, 1929.

. UNITED STATES CLYDE c. Barman, orrrrrsnu'nen, PENNSYLVANIA, ASSIGNOB TO THE wEs'rrNe- HOUSE AIR BRAKE COMPANY, or WILMEBDING, PENNSYLVANIA, A CORPORATION OF BENNSYLVANIA.

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7 Application filed October a, 1927. Serial No; 223,534.

This invention relates to angle cocks for railway air brake systems and more particularly to a type in which a by-passis provided around the angle cock valve for maintaining an open communication around the valve even when the angle cock is in closed position, means being provided to close the bypass when the hose is uncoupled and the brake i 20 provided-with a stem 21 is disposed so that pipe is disconnected between the cars. 7 The purposeof the by-pass is to prevent accidents due to the failure of the air brakes caused by the inadvertent or malicious closing of an angle cock. v With the'above mentioned by-pass type of angle cock, when a car having the brake pipe charged with fluid under pressure is connected to a car which is not charged, and the angle cock is turned to its open position, fluid under pressure Will be vented from the charged brake pipe to the empty brake pipe on the other car, causing a sudden reduction in brake pipe pressure on the charged car and thereby an emergency application of the brakes. l

I The principal object of my invention is to provide a bypass angle cock device having means for preventinga sudden reductionin pressurein the brake pipe-under the above conditions. i j

In the accompanying drawing; Fig. 1 is a sectional view of an angle cock device embodying my invention; Fig. 2 a partial plan view of the angle cock device; and Fig. 3 a section on the line'33 of Fig. 1.

As shown in the drawing, the angle cock device may comprise a cock body 1, a cock key 2, and an operating handle 3. In a preferred form of my invention, the well known locking handle is utilized in connection with my improvement, and consequently the handle shown in the drawing is ofthe locking type adapted to be moved vertically about a pin 4, and also adapted to rotate the cock key in the usual manner.

having a valve portion 6 at one side adapted to engage a'seat rib 7. The valve portion 6 controls communication from a passage 8 leading to the conduit 9 at one side of the key 2, to a passage 10, leading to a chamber 11. The chamber 12 at the outer side of-piston'5 is open to an atmospheric port 13 and con tains a coil spring 14 which urges the valve portion 6 to its seat. Piston 5 is also promediate position.

Disposed in the valve body 1 is a piston 5 vided with a seat rib 15 adapted to engage a seat 16, so that when the'pis'ton ismoved to its seat 16, chamber 12 is sealed from the exhaust port 13.

A passage 17 connects the conduit 22 at the hose end of the angle'cock with a chamber 18,. which communlcates with chamber 11 through an annular opening 19. A plunger it can be shifted into the opening 19 and the diameter of the plunger 20 is slightly less than that of the opening 19, so as torprovide a restricted communicationfrom chamber 11 Q to chamber 18 when the plunger is moved into said opening. i i

- A spring 23' urges the plunger 20 away from the opening 19 and the stem '21 extends out through an opening in a screw plug 24.

A lug 25 is'provided on the handle3'in such a position as to engage the end of th stem 21, when the handle3 is liftedand is adapted to engage thestem in either the open or closed position of the handle, or in any inter- When' cars are connected with the hose coupled, theangle cock open, and the brake pipe charged with the usual pressure, piston 5 is subjected to fluidunder pressure supplied from the conduit 22 at the hose end of the angle cock through passage 17, chamber 18,

opening 19, chamber 11 and passage 10. This pressure readily overcomes the pressure of sprin 14, so-that the piston 5 is moved upward y, causing the valve 6 to lift from its seat 7, so that communication is establishedjaround the cock 2 from conduit 9 to conduit 22. If one or more angle cocks should become closed, either accidently or maliciously, it will be evident that the bypass will remain open, so that fluid under pressure can fflow freely in either direction around the closed angle cock and consequently. the operation ofv the brakes will not be interfered with.

If a car having a charged brake pipe is to be connected to a car which is not charged, the handle 3 is first lifted to release the usual.

lockinglugs and then the handle is slightly rotated so as to turn the cock 2 an amount suflicient to permit a slight flow of fluid from conduit9 to conduit 22 through the waterways 26, but not at a rate of flow such as would cause an emergency rate of reduction in brake pipe pressure.

When the handle 3 is lifted, the lug 25 en- .ing 19.

gages thestem 21 and moves same'so as to cause the plunger 20 to enter. into the open This restricts communication between passages 10 and 17, so that when the "piston 5 is moved upwardly by the pressure of fluid supplied to the conduit-22' through the slight opening ofthe- Waterways 2 6 and 7 by Way of passage 17, opening 19, and passage 10', While the valve 6 is opened, the fiOWOf fluid from condit 9 toconduit' 22"Will'still be restricted, since the plunger 20 is disposed inflth'elopening l9, so astolirnit tllQfiQW-Ol ,fiuid thereth-rougl .beit'unther rotated, so as to {to its tully'open position.

the appended claims;

' Islaim as new.

7 After the fluidpressure has equalized on oppositesides ofthe 00011.2, the handle 3 may shift the valve 2 .NVhile one illustrative 'einbodi nent oi the invention. has been described in detail, it is ,notmy intention to limit its scope'to that-embodiment or otherwise than bythe terms of Having now described my invention, what and deslreto secure by Letters Patentyis Y 1 1. a gle cock device comprising a cock fhavinga by-pass passage for establishing communication. from one side to the other and' means for temporarily restricting comniunication ithrongh said passage.

v2. Ananglefcock "device comprising a cock having a bypass passagelor establishing .c o;1 ninunication iii omone side to the'cther and manually operable means for restricting communication through sa d passage.

. 3. Ah angle cock device comprisinga brake .pipe'rcock having. abyass passage for establish ng communication from one side to the other', a valvefor controlling said passage, a

piston exposed on onesideto brake pipe presment of said handlefor. restricting communiv cation through said passage. 6'. An anglecoel: devicecomprising a brake pipe cock having by-passpassage tor establishing: communication from one side to the other a pivoted handle for operating said '5.An angle cock devicecomprising a brake .coclgan opening establishing conmiun ication through said passage,-and a plungeroperated by. 'pivotalmovem'ent of said handle for engaging in said opening, to restrict communication through said'passage; V V r r7 The-method of operating an angle cock having a brake pipe. cock and a by-passpassage establishing communication from one side of the cock to the other which consists in moving the cock from itslclos'ed position to permit a; restricted flow through the cock from one side to thef'other and in operating jineans for restricting thefioiv through the bypass passage un'til the fluid pressure on opposite sides of theeock haVesubStantially equalized and finally moving theicock to its ("fully openpositionf a i v g d 3' In testimony whereofIha-ve hereunto set my hand; i

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